<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <alpha
        android:duration="500"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" />
<scale  

            android:fromXScale="1.0"   

            android:toXScale="0.0"  

            android:fromYScale="1.0"   

            android:toYScale="0.0"   

            android:pivotX="50%"  

            android:pivotY="50%"   

            android:duration="500"/>  
</set>